ajo_message_feedback_event_dataset and other AJO datasets

Hi, I am trying to extract some information from the AJO datasets, and I would like to know some more details about some of the fields.

For example, what are all the values that can shows under 

_experience.customerJourneyManagement.messageDeliveryfeedback.feedbackStatus 

and what is their meaning> I can see stuff like sent, delay, error, exclude. I would also expect something like bounce, but what else?

Is there a DETAILED documentation on these tables and what they contain?

Please note I already saw this one: Journey Optimizer Schemas, and the descriptions are very brief and do not answer my question.

So my question is: ca I find somewhere a more detailed description of the fields, especially the ones with a finite number of valid values, like feedbackstatus above?

Thanks